The Inova X1 is a serious flashlight that offers exceptional engineering and illumination for its compact 4-inch size. Powered by a single AA alkaline battery, the X1 Flashlight has a patented optical system as well as a precision machined aluminum reflector with thermal interface that provides excellent light projection and visibility. The uniform focused spot with flood beam pattern has an effective range of 223 feet and its beam can be also be seen in the dark for up to 1.5 miles. This is an perfect flashlight for keeping close at hand in a glove box, purse, brief case, backpack, and everywhere you go. Great light for flight attendants.